Pump



Aug. 7, 928. w ms'z 1Q MARKS PUMP Filed March 26, 1927 Tatented Aug. 7, 192%.

ISIDORE MARKS; 0F DORCHESTER, MASSACHUSETTS, ASSIGNOR TO KEYSTONE MFG. 00., OF BOSTON, MASSACHUSETTS, A CORPORATION OF. MASSACHUSETTS.

rune.

Application filed March 26, 1927. Serial No. 178,764.

tor, No. 1,640,417 granted August 30, 1927 upon a copending application, there is dis closed a toy water-tower truck having a water supply tank, with which a hose is connected, and having also an air pump which is connected with the tank and is adapted to r be operated to force a stream of water through the hose. One object of the present invention is to provide a pump of the type above referred to which is of simple construction and well adapted for economical quantity production, but which nevertheless isso made that it maybe relied upon to operate effectively and not to get out of order under the hard usage given by children in operating the toys.

Another object of the invention is to provide an air pump adapted to toy trucks which is especially constructed and arranged to simulate certain characteristic features of the engine of motor trucks.

To the accomplishment, of these objects,

and such others as may hereinafter appear, the invention comprises the features of construction and combinations of parts hereinafter described and claimed.

. The invention will beexplained with reference to the accompanying drawings illustrating the preferredv embodiment thereof, in whichz Figure 1 is a perspective view of a toy w water tower truck equippedwith a water tank and with an air pump constructed in accordance with the features of the present invention;

Fig. 2 is avvertical sectional view of the pump shown in 1; 1

Fig. 3 is a bottom plan view of the pump P t n; o v I ig..4 is a detailed elevational view of the crank or handle for operating the pump; and.

Fig. 5 is a detailed perspective View of the inlet valve. i i

Referring first to Fig.1 of'the drawings, the novel pump is shown, for illustrative purposes, as applied to a toy truck having a chassis 6, a body 7, a water tower 8, a water supply tank 9 and ahose 10 connecting cylinder 12 is supported in upright position upon a frame member 14 which is secured to the side frames of the chassis'at the forward end thereof. The frame member 14 is. so made as to simulate the crank case and'associated portions of the body of the engine of a motor truck, while the pump cylinder itself is arranged to simulate the casting for the cylinders of the motor. To this end the pump cylinder 12 is secured to a horizontally disposed rectangular portion 15 of the frame member 14. The frame member further comprises two side pieces 16 which are bent downwardly at an angle to the portion 15 at the opposite sides thereof and have hori zontal flanges 17 at their outer edges which are fastened to the opposite sides of the frame 6, a vertical front ortion 18 and a rearward extension 19 whic 1 slopes upwardly with respect to the horizontal portion 15 and terminates in a vertical flange 2O adapted to be secured to the dashboard 21 of the truck. The pump cylinder and its supporting frame are adapted to be covered normally by means of an engine hood 22 which is pivoted at 23 to the dashboard 21.

The pump cylinder 12 consists of a cup of drawn sheet material (see Fig. 2') positioned bottomuppermost, said bottom constituting itshead while the rim or open end of the cup projects downwardly through a circular aperture in the portion 15 of the supporting frame. As exterior annular bead or rib 25 formed integrally in the wall of the cup or cylinder 12 a short distance from its open end is adapted to engage the upper face of the supporting frame and determines the distance the cylinder may be projected through the aperture made to receive it. The lower edge of the cylinder wall is rolled or spun outwardly against the lower face of the supporting frame, as shown at 26, thus rigidly securing the pump cylinder in place without the-use of fastening devices other than the integral head 25 and rim 26 of the pump cylinder itself.

The pump is provided with a piston 27 having pivoted thereto a piston rod 28, which may conveniently be a fiat bar, extending downwardly through the open lower end of the pump cylinder connected at lower end to a crank pin 29 carried by a disk 30 fixed t0 the inner end of a horizontal driving shaft 31; The shaft 31 extends through an aperture 32 in the front flange 18 of the frame 14 and through an aperture 33 in the front bar of the chassis frame. In forming the aperture 32 an annular rim orilange 34 is struck up thus providing a bearing of sub stantial; length for the shaft 31. p y

Acra'nk arm 35, having a folding handle 36 pivoted thereto at 37, is rigidly secured to the front end of the shaft 31 and thus snnulates the hand crank of a motor truck engine. The hand crank provides natural appcaring means for operating the pump. As shown in Fig; 4, the crank arm is provided with a flat sided aperture 38 which receives the correspondingly shaped end 39 of the shaft 31. The crank arm 35 is held fast against a shoulder 40 on the shaft 31 bythe head of a screw 41. Rearward displacement of the shaft 31 is prevented by engagement of the crank arm 35 with the chassis frame and forward displacement of the shaft s prevented by a shoulder 42 on the shaft which will engage the chassis frame. The

above described construction of the pump cylinder and frame member 14 enables the pump and its operating mechanism to be self contained andcapable of being assembled as i a unit before attachment to the truck' The attachment may readily be effected by means of screws through the flanges 17 and 20 of thefra'ine member, it being necessarymerely to remove the crank arm 35 from the shaft 31 to enable the latter to be projected through the aperture 33 in the chassis frame.

The piston 27 (Figs. 2 and 3) comprises a leather disk44 which is clamped between a metallic follower or piston head 45 and a metallic cap disk 46, the margin of the .leather disk projecting beyond the cap disk and being turned upwardly for engagement with the inside of the cylinder wallso as to ,s'lide freely therein but to prevent air, leak age ast the piston. Accordingly a f thin meta lic spreader member or disk 47 is inter rposed between the leather disk and the upper oap disk46; the margin of the spreader disk 47'being serrated or notched to provide. a

yielding or spring-like margin which is upturned to engage the inner wall of the the upturned margin of the leather disk. The

' inder Wall.

leather is thus held closely against the cyl- The follower 45 is in the form of a cup having a fiat bottom wall which vthe follower cup 45 isa second .cap disk 48 having apair of centrally located spaced ears v49- struck up thereon between which is piv-- oted, upon a pin50, the upper end of the piston rod 28. As shown, all the above menwhich may consist of an ordinary tubular rivet, the head of which constitutes a valve closure, whilethe shank of the rivet consti; tutes a valvestem. As shown the tubular The lower end of thevpiston rod shank of the rivet constituting the inlet valve 53 extends through, and is capable of free upward and downward movement in, a small aperture or inlet port in the cylinder head. .A rubber washer'55 fitted over the shank of the rivet is adapted for air tight engagement with a valve seat formed by the under face of the cylinder head immediately surrounding the inlet port. As a convenient means for holding the tubular rivet valve within the aperture in the cylinder head a pair of lugs 56 (Fig. 5) are struck up from the free end of the rivet shank, these lugs being spaced" far enough from thehead of the rivet to permit such axialinovementof the valve in the inlet for successful operation. I V

The closure of the outlet valve 54 may be made from a tubular rivet in the same way as the inlet valve. This rivetextends with its head uppermost through an outlet port consisting of an aperture formed in a transverse partition within the upper reduced portion of a nipple 57 that is carried by the head of the pump cylinder to provide a convenient means" for connecting the air tube 13 with the pump. As shown the lower end of the nipple 57 extends through an aperture in the cylinder head as far as permitted by an annular shoulder 58 onthe port as is necessary,

nipple. The portionof the nipple projecting below the cylinder head is rolled over or spun at 60 against a rubber washer 59 to provideian air tight joint. The conduit 13 may be tightly secured to the nippleby a suitable band or'wire 61.

The arrangement of the valvescis such that upon the downwardor intake stroke of the piston the inlet valve .53 will open and the outlet valve 54 will c1ose,"while upon the upward or pumping stroke of the piston the inlet valve will close and the outlet valve "ile will open. An opening 62 is provided in the j portion 19 of the frame member" 14 through which the air tube may conveniently pass on 1ts way to the water tank 9.

Besides simulating the general appearance of the motor and crank case of a motor truck, the above desoribedcpump is of unusually simple but nevertheless of a highly practicable and inexpensive construction There is no machine work necessary upon any of the parts of the pump including the and comprising, in combination, a pump cylinder, pumpoperating mechanism including a rotary shaft and a. sheet metal frame having acylinder supporting portion, downwardly andoutwardly extending side walls flanged for attachment to a support, and a downwardly extending front wall for supporting said pump operating shaft.

2. In a pump construction, the combination with a sheet metal frame having a circular aperture therein, side walls with attaching flanges and an integral rearwardly and upwardly extending portion whereby the frame may be secured in position, and a pump cylinder projecting into said aperture and being permanently assembled and forming with the frame a unitary member.

8. A device of the class described having, in combination, a pump cylinder open at one end and closed at the other end, a piston in the cylinder, a frame member having portions adapted to be secured to the side frames of the chassis and to the dashboard of the truck and a top portion having an aperture to receive the open end of the pump cylinder, an outlet nipple secured in the closed end of the cylinder, an outlet valve in the nipple,

an air tube connected with the nipple, an inlet valve in the closed end of the cylinder, a bearing in the frame member, a crank shaft journaled in the bearing, a hand crank at one end of the shaft, a crank disk carrying a crank pin at the other end of the shaft, and a piston rod connecting the crank pin with the piston.

fl. In a pump the combination with a pump cylinder of a piston in said cylinder comprising a leather disk having an outturned flange fitted to slide within said cylinder, va cup-shaped follower having a flat bottom wall for engaging and supporting the leather disk and a marginal flange turned away from the leather disk for sliding engagement within the cylinder, a cap plate in engagement with the bottom of the follower cup, a pair of spaced ears struck up from the cap plate, a disk in engagement with the outer side of said leather disk having out-turned spaced marginal ears engaging the inside of the out-turned flange of the leather disk, a second cap disk engaging the outer face of the spreader disk, and means securing said piston parts rigidly together, and a piston rod pivotally mounted between said ears.

5. A pump unit for toy trucks comprising, in combination, a one-piece frame of light sheet metal including a horizontally disposed cylinder-supporting portion merging at either side into downwardly bent side pieces, at its front end into a vertical wall and at its rear end into an upwardly bent extension terminating in a vertical flange, a cylinder carried by said supporting portion, and pump operating mechanism carried by said front vertical wall.

ISIDORE MARKS. 

